One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,14)(8,17)(9,12)(10,13)(11,16)(15,19)(18,20)(21,22)(23,24)(25,27)(26,29)(28,33)(30,34)(31,36)(32,35) involution — undirected(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(22,27)(23,30)(24,31)(26,32)(28,36)(33,34) involution — undirected(1,2,3,4)(21,23,26,30,25,28,32,36)(22,24,29,34,27,33,35,31)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(22,27)(23,28)(29,35)(30,36)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(21,24,32,31,25,33,26,34)(22,28,35,30,27,23,29,36)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.